/**
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

"use strict";

const fs = require("fs");
const glob = require("glob");

const META_COPYRIGHT_COMMENT_BLOCK =
  `/**
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */`.trim() + "\n\n";

const files = glob.sync("**/*.{js,ts,tsx,jsx,rs}", {
  ignore: [
    "**/dist/**",
    "**/node_modules/**",
    "**/tests/fixtures/**",
    "**/__tests__/fixtures/**",
  ],
});

const updatedFiles = new Map();
let hasErrors = false;
files.forEach((file) => {
  try {
    const result = processFile(file);
    if (result != null) {
      updatedFiles.set(file, result);
    }
  } catch (e) {
    console.error(e);
    hasErrors = true;
  }
});
if (hasErrors) {
  console.error("Update failed");
  process.exit(1);
} else {
  for (const [file, source] of updatedFiles) {
    fs.writeFileSync(file, source, "utf8");
  }
  console.log("Update complete");
}

function processFile(file) {
  let source = fs.readFileSync(file, "utf8");

  if (source.indexOf(META_COPYRIGHT_COMMENT_BLOCK) === 0) {
    return null;
  }
  if (/^\/\*\*/.test(source)) {
    source = source.replace(/\/\*\*[^\/]+\/\s+/, META_COPYRIGHT_COMMENT_BLOCK);
  } else {
    source = `${META_COPYRIGHT_COMMENT_BLOCK}${source}`;
  }
  return source;
}
